Package net.sf.jasperreports.engine

Interface JRDataSource

All Known Subinterfaces:
IndexedDataSource, JRRewindableDataSource, JsonData<T>, RandomAccessDataSource
All Known Implementing Classes:
AbstractPoiXlsDataSource, AbstractXlsDataSource, AbstractXmlDataSource, BookmarksFlatDataSource, ColumnValuesDataSource, ConsumedFirstRecordDataSource, DataSourceCollection, ExcelDataSource, FastExcelDataSource, JaxenXmlDataSource, JRAbstractBeanDataSource, JRAbstractTextDataSource, JRBeanArrayDataSource, JRBeanCollectionDataSource, JRCsvDataSource, JREmptyDataSource, JRHibernateAbstractDataSource, JRHibernateAbstractDataSource, JRHibernateIterateDataSource, JRHibernateIterateDataSource, JRHibernateListDataSource, JRHibernateListDataSource, JRHibernateScrollDataSource, JRHibernateScrollDataSource, JRJpaDataSource, JRJpaDataSource, JRMapArrayDataSource, JRMapCollectionDataSource, JRMondrianDataSource, JROlapDataSource, JRResultSetDataSource, JRTableModelDataSource, JRXlsxDataSource, JRXmlDataSource, JsonDataCollection, JsonDataSource, JsonQLDataSource, ListOfArrayDataSource, Olap4jDataSource, RandomDataSource, RewindableDataSourceCollection, SortedDataSource, XalanXmlDataSource, XlsDataSource
public interface JRDataSource
This interface represents the abstract representation of a JasperReports data source. All data source types must implement this interface.

Every time a report is filled, an instance of this interface is supplied or created behind the scenes by the reporting engine.

JasperReports provides default implementations of result set, bean collections and bean arrays data sources.

Author:
Teodor Danciu (teodord@users.sourceforge.net)

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    getFieldValue(JRField jrField)
    Gets the field value for the current position.
    boolean
    next()
    Tries to position the cursor on the next element in the data source.

  • Method Details

    • next

      boolean next() throws JRException
      Tries to position the cursor on the next element in the data source.
      Returns:
      true if there is a next record, false otherwise
      Throws:
      JRException - if any error occurs while trying to move to the next element

    • getFieldValue

      Object getFieldValue(JRField jrField) throws JRException
      Gets the field value for the current position.
      Returns:
      an object containing the field value. The object type must be the field object type.
      Throws:
      JRException